大功率燃料电池阴极催化剂的设计和可控量产制备  

Design and controlled mass production of cathode catalysts for powerful fuel cell

作　　者：李荣荣 雷红红 翟兆岩 吴磊 李小丽 刘保银 张艳娜 王熙 肖建军 Rongrong LI;Honghong LEI;Zhaoyan ZHAI;Lei WU;Xiaoli LI;Baoyin LIU;Yanna ZHANG;Xi WANG;Jianjun XIAO(Henan Provincial Key Laboratory for Metal Fuel Battery,Zhengzhou,Henan 450001,China;Zhengzhou Foguang Power Generation Equipment Co.,Ltd.,Zhengzhou,Henan 450001,China;School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou,Henan 450001,China)

机构地区：[1]河南省金属燃料电池重点实验室,河南郑州450001 [2]郑州佛光发电设备股份有限公司,河南郑州450001 [3]郑州大学机械与动力工程学院,河南郑州450001

出　　处：《过程工程学报》2023年第7期995-1002,共8页The Chinese Journal of Process Engineering

摘　　要：推进能源结构调整,发展绿色低碳技术对于推动我国清洁能源利用、保障用电安全、实现“双碳”目标具有重要的战略意义。金属燃料电池具有高能量密度、低成本、高安全性、清洁无污染等优势,是极具潜力的新一代电能源装置,近年来受到广泛关注。然而,由于关键性技术未突破、阴极催化剂成本高等问题,导致金属燃料电池未能实现大规模应用。高性能非贵金属催化剂的开发是燃料电池有效推广的重要前提,本研究采用价格低廉的碳纳米管、乙酸钴、乙酸锰和氢氧化钠作为原材料,利用一步共沉淀法在多壁碳纳米管基体上负载过渡金属氧化物,制备了具有稳定结构的尖晶石相的CoMn_(3)O_(x)/CNTs催化剂。X射线衍射及氧还原测试结果表明,煅烧温度为350℃的催化剂的结晶度高,氧还原催化活性最高。扫描电镜及能谱分析结果显示,CoMn_(3)O_(x)活性成分均匀附着在碳纳米管表面,颗粒大小为纳米级,各组分元素分布均匀,Co和Mn元素的原子数比接近设计值1:3。氧还原性能测试结果显示,CMO/CNTs-350催化剂的极限电流密度和半波电位分别达到5.59 mA/cm^(2)和0.75 V,宏量制备后性能保持良好。将该催化剂应用于3 kW铝空气电源,恒功率连续运行12 h后单体平均电压1.14 V。基于原材料丰富易得、生产工艺可控、电化学性能优异等特点,CMO/CNTs-350催化剂是一种非常有潜力的金属燃料电池阴极催化剂。It has an important strategic significance to promote the utilization of clean energy,ensure the safety of electricity and then achieve carbon peaking and carbon neutrality goals.Therefore,we must promote the adjustment of energy structure,and develop technologies that are green,environmental protection,and low carbon energy saving.With excellent characteristics,such as high energy density,low cost,high safety,and clean and pollution-free,metal fuel cell has become a new generation of electric energy device,gained widespread traction in recent years.However,due to a lack of breakthroughs in key technologies and the high cost of cathode catalysts,metal fuel cells have not achieved large-scale application.There is great significance to developing nonprecious metal catalysts,which can promote the development and promotion of metal fuel cells.In this work,carbon nanotubes,cobaltous acetate,manganese acetate,and sodium hydroxide were used as raw materials,which were much cheaper than platinum-carbon.Transition metal oxides were prepared and supported on the multi-wall carbon nanotube matrix through the method of coprecipitation,which was a spinel phase CoMn_(3)O_(x)/CNTs catalyst.The XRD and oxygen reduction reaction(ORR)results indicated that increasing the pyrolysis temperature from 250℃to 350℃increased the crystallinity of the catalyst and the catalytic activity for oxygen reduction.The catalytic activity of CMO/CNTs-400 decreased as the particles grow a little larger.The SEM/EDS results showed that CoMn_(3)O_(x)uniformly loaded on the surface of carbon nanotubes,with a particle size of nanoscale and a uniform distribution of each component element.The atomic number ratio of Co and Mn elements was close to 1:3.The current density and half-wave potential were 5.59 mA/cm2 and 0.75 V,respectively,which was obtained from ORR of CMO/CNTs-350.Furthermore,the CMO/CNTs-350 catalysts maintain good performance after macroscopic preparation.At 3 kW loaded,the aluminum air fuel cells assembled with CMO/CNTs-350 catalysts c

关 键 词：钴锰复合氧化物 共沉淀法 氧还原催化 金属燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TQ426[化学工程]